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Pectoral morphology in Doliodus : bridging the 'acanthodian'-chondrichthyan divide

by: Maisey, John G., author

Publication date: 2017

Usage: Attribution-NonCommercial-ShareAlike 4.0 International

Topics: Doliodus problematicus, Shoulder girdle, Spines (Zoology), Chondrichthyes, Evolution, Phylogeny, Chondrichthyes, Fossil, Fishes, Fossil, Fishes, Paleontology, Chondrichthyes -- Evolution, Chondrichthyes -- Phylogeny, Chondrichthyes, Fossil -- New Brunswick, Fishes, Fossil -- New Brunswick, Fishes -- Evolution, Fishes -- Phylogeny, Paleontology -- Devonian -- New Brunswick, Paleontology -- New Brunswick

Publisher: New York, NY : American Museum of Natural History

Collection: biodiversity; americanmuseumnaturalhistory

Contributor: American Museum of Natural History Library

Language: English

Rights: http://biodiversitylibrary.org/permissions

Rights-holder: American Museum of Natural History Library

Volume: 3875

15 pages : 26 cm

Doliodus problematicus (NBMG 10127), from the Lower Devonian of New Brunswick, Canada (approx. 397-400 Mya) is the earliest sharklike jawed vertebrate (gnathostome) in which the pectoral girdle and fins are well preserved. Its pectoral endoskeleton included sharklike expanded paired coracoids, but Doliodus also possessed an "acanthodian-like" array of dermal spines, described here for the first time. Doliodus provides the strongest anatomical evidence to date that chondrichthyans arose from "acanthodian" fishes by exhibiting an anatomical mosaic of "acanthodian" and sharklike features

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"March 10, 2017."

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Includes bibliographical references (pages 14-15)

Abstract: Doliodus problematicus (NBMG 10127), from the Lower Devonian of New Brunswick, Canada (approx. 397-400 Mya) is the earliest sharklike jawed vertebrate (gnathostome) in which the pectoral girdle and fins are well preserved. Its pectoral endoskeleton included sharklike expanded paired coracoids, but Doliodus also possessed an 'acanthodian-like' array of dermal spines, described here for the first time. Doliodus provides the strongest anatomical evidence to date that chondrichthyans arose from 'acanthodian' fishes by exhibiting an anatomical mosaic of 'acanthodian' and sharklike features.

Addeddate: 2019-01-30 17:56:34

Associated-names: Miller, Randall F. (Randall Francis), 1956- author; Pradel, Alan, author; Denton, John S. S., author; Bronson, Allison, author; Janvier, Philippe, author